This is a stainless steel Vacheron Constantin Overseas Chronograph 5500V/110A-B075. It has an integral stainless steel link bracelet with a push button deployant clasp, and a scratch resistant sapphire crystal. The 42.5mm diameter three-body case and notched steel bezel are polished and brushed. It has screwed down round pushbuttons for the column wheel chronograph, and a screwed down winding crown. The dial is silver with applied luminous steel hour index markers and luminous steel baton hands. There is a subsidiary dial for the small seconds at the 9 o'clock position, a 30-minute register at 3 o'clock, and a 12-hour sub dial at 6. The date aperture is located between 4 and 5 o'clock, and it's water resistant to 150 meters. It has an anti-magnetic core that's resistant to 25,000 A/m, and a 52-hour power reserve at full wind. The 13.7mm case, dial, and movement are all signed.